code: def y_prime_f_factor(self, dt, f):
      raise NotImplementedError
  
file_path: torchsde/torchsde/_core/methods/milstein.py
imports: import abc
  from ..None import adjoint_sde
  from ..None import base_solver
  from ...settings import SDE_TYPES, NOISE_TYPES, LEVY_AREA_APPROXIMATIONS, METHOD_OPTIONS
label_desc: Use image node_id 3 for calling the BaseMilstein obj's underlying member method code with example usage: obj.y_prime_f_factor(dt, f) without return types